Pyramidale Carbokationen

Schwarz, Helmut

doi:10.1002/ange.19810931205

Cited by 29 publications

(1 citation statement)

References 113 publications

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“…The tetracyclopropyl-substituted fulvene derivative 23 and the tetracyclopropylcyclopentadienone 24 have both been envisaged as logical precursors to the pentacyclopropylcyclopentadienyl cation 22 (Scheme 6), which according to Becke 3LYP/3-21G and HF/3-21G computations [20] should have a singlet ground state unlike the antiaromatic parent cyclopentadienyl cation [21]. The fulvene derivative 23 and the pentacyclopropylcyclopentadienol 25, both derived from tetracyclopropylcyclopentadienone 24 have therefore been defined as desirable targets for synthesis [22].…”

Section: Heteroanalogous Fulvene Derivativesmentioning

confidence: 99%

Unsaturated Oligoquinanes and Related Systems

Haag

Meijere

1998

Topics in Current Chemistry

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Fully unsaturated oligoquinanes comprise a class of fused five-membered ring compounds which contain extended p-systems with interesting electronic properties. This class of rigid molecules contains planar, bowl-and even ball-shaped structures, and their strain energy increases for each additionally fused five-membered ring. The first three members of this family, fulvene, pentalene and acepentalene have been synthesized or at least generated, whereas all higher members were only approached or studied by computational methods. In this review the class of fully unsaturated oligoquinanes -ranging from fulvene to C 20 -fullerene -is presented with respect to their syntheses and their properties. Also, related molecules with similar structural features will be discussed, which have not been highlighted in previous volumes of this series [1,2].

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Section: Heteroanalogous Fulvene Derivativesmentioning

confidence: 99%